Provides facilities to check if a user has authenticated, retrieve their email address, and check if they are an administrator for this application. It can also be used to construct a URL for users to login or logout.
As an example, your application might, in a JSP file, have code like this:
<%
UserService userService = UserServiceFactory.getUserService();
if (!userService.isUserLoggedIn()) {
%>
Please {@code ">log in>}
<% } else { %>
Welcome, <%= userService.getCurrentUser().getNickname(); %>!
{@code (">log out>)}
<%
}
%>>See Also: com.google.appengine.api.users.UserService, The Users Java API in the Google App Engine Developer's Guide.
Classes
IUserServiceFactoryProvider
Creates IUserServiceFactory implementations.
Note: This class is not intended for end users.
User
User represents a specific user, represented by the
combination of an email address and a specific Google Apps domain
(which we call an authDomain). For normal Google login,
authDomain will be set to "gmail.com".
UserServiceFactory
Creates a UserService.
Interfaces
IUserServiceFactory
This interface should be implemented by providers of the UserService and registered with com.google.appengine.spi.ServiceFactoryFactory.
UserService
The UserService provides information useful for forcing a user to log in or out, and retrieving information about the user who is currently logged-in.
Exceptions
UserServiceFailureException
UserServiceFailureException is thrown when any unknown
error occurs while communicating with the user service.